raster_text.c revision 1.4
1 /* $NetBSD: raster_text.c,v 1.4 2000/03/30 12:45:41 augustss Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to the Computer Systems 8 * Engineering Group at Lawrence Berkeley Laboratory and to the University 9 * of California at Berkeley by Jef Poskanzer. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)raster_text.c 8.1 (Berkeley) 6/11/93 40 */ 41 42 /* 43 * Text routines for raster library. 44 */ 45 46 #ifdef _KERNEL 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <dev/rcons/raster.h> 50 #ifdef COLORFONT_CACHE 51 #include <sys/malloc.h> 52 #define NEW(size) malloc(size, M_DEVBUF, M_NOWAIT) 53 #endif 54 #else 55 #include <sys/types.h> 56 #include <string.h> 57 #include "raster.h" 58 #ifdef COLORFONT_CACHE 59 #include <malloc.h> 60 #define NEW(size) malloc(size) 61 #endif 62 #endif 63 64 /* Draws text. Returns 0 on success, -1 on failure. */ 65 int 66 raster_text( r, x, y, rop, rf, text ) 67 struct raster* r; 68 int x, y; 69 int rop; 70 struct raster_font* rf; 71 unsigned char* text; 72 { 73 return raster_textn( r, x, y, rop, rf, text, strlen( text ) ); 74 } 75 76 /* Draws n characters of text. Returns 0 on success, -1 on failure. */ 77 int 78 raster_textn( r, x, y, rop, rf, text, n ) 79 struct raster* r; 80 int x, y; 81 int rop; 82 struct raster_font* rf; 83 unsigned char* text; 84 int n; 85 { 86 int clip; 87 int x1, y1; 88 struct raster_char* c; 89 struct raster* charrast; 90 int i; 91 unsigned char ch; 92 int thisx, thisy; 93 int phase; 94 95 /* Check whether we can avoid clipping. */ 96 clip = 0; 97 if ( rf->flags & RASFONT_FIXEDWIDTH && 98 rf->flags & RASFONT_NOVERTICALMOVEMENT ) 99 { 100 /* This font is well-behaved, we can compute the extent cheaply. */ 101 c = &(rf->chars['@']); 102 charrast = c->r; 103 if ( x + c->homex < 0 || y + c->homey < 0 || 104 x + c->homex + n * c->nextx > r->width || 105 y + c->homey + charrast->height > r->height ) 106 clip = 1; 107 } 108 else 109 { 110 /* Got to step through the string to compute the extent. */ 111 for ( i = 0, x1 = x, y1 = y; 112 i < n; 113 ++i, x1 += c->nextx, y1 += c->nexty ) 114 { 115 c = &(rf->chars[text[i]]); 116 charrast = c->r; 117 if ( charrast != (struct raster*) 0 ) 118 { 119 if ( x1 + c->homex < 0 || y1 + c->homey < 0 || 120 x1 + c->homex + charrast->width > r->width || 121 y1 + c->homey + charrast->height > r->height ) 122 { 123 clip = 1; 124 break; 125 } 126 } 127 } 128 } 129 130 /* Now display the text. */ 131 for ( i = 0, x1 = x, y1 = y; 132 i < n; 133 ++i, x1 += c->nextx, y1 += c->nexty ) 134 { 135 ch = text[i]; 136 c = &(rf->chars[ch]); 137 charrast = c->r; 138 if ( charrast != (struct raster*) 0 ) 139 { 140 thisx = x1 + c->homex; 141 thisy = y1 + c->homey; 142 143 phase = 0; 144 #ifdef COLORFONT_CACHE 145 if ( r->depth == 8 ) 146 { 147 /* Initialize color font cache if necessary. */ 148 if ( rf->cache == (struct raster_fontcache*) -1 ) 149 { 150 int c; 151 152 rf->cache = (struct raster_fontcache*) 153 NEW( sizeof(struct raster_fontcache) ); 154 if ( rf->cache != (struct raster_fontcache*) 0 ) 155 for ( c = 0; c < 256; ++c ) 156 rf->cache->cr[c] = (struct raster*) 0; 157 } 158 159 if ( rf->cache != (struct raster_fontcache*) 0 ) 160 { 161 int color; 162 struct raster* cr; 163 164 color = RAS_GETCOLOR( rop ); 165 cr = rf->cache->cr[ch]; 166 /* Is this character cached yet? */ 167 if ( cr != (struct raster*) 0 ) 168 { 169 /* Yes, but is it the right color? */ 170 if ( rf->cache->color[ch] == color ) 171 { 172 /* Yes - switch rasters. */ 173 charrast = cr; 174 } 175 else 176 { 177 /* No, re-draw it. */ 178 if ( raster_op_noclip( 179 cr, 0, 0, charrast->width, 180 charrast->height, rop, charrast, 0, 0 ) == 0 ) 181 { 182 rf->cache->color[ch] = color; 183 charrast = cr; 184 } 185 } 186 } 187 else 188 { 189 /* It's not cached, so cache it. */ 190 cr = raster_alloc( 191 charrast->width, charrast->height, 8 ); 192 if ( cr != (struct raster*) 0 ) 193 if ( raster_op_noclip( 194 cr, 0, 0, charrast->width, charrast->height, 195 rop, charrast, 0, 0 ) == 0 ) 196 { 197 rf->cache->color[ch] = color; 198 charrast = rf->cache->cr[ch] = cr; 199 } 200 } 201 } 202 } 203 #endif /*COLORFONT_CACHE*/ 204 205 if ( clip ) 206 { 207 if ( raster_op( 208 r, thisx, thisy, charrast->width, charrast->height, 209 rop, charrast, phase, 0 ) < 0 ) 210 return -1; 211 } 212 else 213 { 214 if ( raster_op_noclip( 215 r, thisx, thisy, charrast->width, charrast->height, 216 rop, charrast, phase, 0 ) < 0 ) 217 return -1; 218 } 219 } 220 } 221 222 return 0; 223 } 224 225 #ifdef COLORFONT_CACHE 226 /* Allocates a raster. Returns (struct raster*) 0 on failure. */ 227 struct raster* 228 raster_alloc( width, height, depth ) 229 int width, height, depth; 230 { 231 struct raster* r; 232 int linelongs; 233 234 if ( width <= 0 || height <= 0 || ( depth != 1 && depth != 8 ) ) 235 return (struct raster*) 0; 236 linelongs = ( ( width * depth + 31 ) >> 5 ); 237 r = (struct raster*) 238 NEW( sizeof(struct raster) + height * linelongs * sizeof(u_int32_t)); 239 if ( r == (struct raster*) 0 ) 240 return (struct raster*) 0; 241 242 r->width = width; 243 r->height = height; 244 r->depth = depth; 245 r->linelongs = linelongs; 246 r->pixels = (u_int32_t*) (r + 1); 247 r->data = (caddr_t) 0; 248 return r; 249 } 250 #endif 251
Indexes created Tue Sep 23 23:09:58 GMT 2025